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<a name="Symbol-Names"></a>
<h4 class="subsection">3.10.3 Symbol Names</h4>
<a name="index-symbol-names"></a>
<a name="index-names"></a>
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<p>Unless quoted, symbol names start with a letter, underscore, or period
and may include letters, digits, underscores, periods, and hyphens.
Unquoted symbol names must not conflict with any keywords.  You can
specify a symbol which contains odd characters or has the same name as a
keyword by surrounding the symbol name in double quotes:
</p><div class="smallexample">
<pre class="smallexample">&quot;SECTION&quot; = 9;
&quot;with a space&quot; = &quot;also with a space&quot; + 10;
</pre></div>

<p>Since symbols can contain many non-alphabetic characters, it is safest
to delimit symbols with spaces.  For example, &lsquo;<samp>A-B</samp>&rsquo; is one symbol,
whereas &lsquo;<samp>A - B</samp>&rsquo; is an expression involving subtraction.
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